/* * Read a strip of data from the file. */ tsize_t TIFFReadRawStrip(TIFF* tif, tstrip_t strip, tdata_t buf, tsize_t size) { static const char module[] = "TIFFReadRawStrip"; TIFFDirectory *td = &tif->tif_dir; tsize_t bytecount; if (!TIFFCheckRead(tif, 0)) return ((tsize_t) -1); if (strip >= td->td_nstrips) { TIFFError(tif->tif_name, "%lu: Strip out of range, max %lu", (unsigned long) strip, (unsigned long) td->td_nstrips); return ((tsize_t) -1); } bytecount = td->td_stripbytecount[strip]; if (bytecount <= 0) { TIFFError(tif->tif_name, "%lu: Invalid strip byte count, strip %lu", (unsigned long) bytecount, (unsigned long) strip); return ((tsize_t) -1); } if (size != (tsize_t)-1 && size < bytecount) bytecount = size; return (TIFFReadRawStrip1(tif, strip, buf, bytecount, module)); }
/* * Read a strip of data from the file. */ tmsize_t TIFFReadRawStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size) { static const char module[] = "TIFFReadRawStrip"; TIFFDirectory *td = &tif->tif_dir; uint64 bytecount; tmsize_t bytecountm; if (!TIFFCheckRead(tif, 0)) return ((tmsize_t)(-1)); if (strip >= td->td_nstrips) { TIFFErrorExt(tif->tif_clientdata, module, "%lu: Strip out of range, max %lu", (unsigned long) strip, (unsigned long) td->td_nstrips); return ((tmsize_t)(-1)); } if (tif->tif_flags&TIFF_NOREADRAW) { TIFFErrorExt(tif->tif_clientdata, module, "Compression scheme does not support access to raw uncompressed data"); return ((tmsize_t)(-1)); } bytecount = td->td_stripbytecount[strip]; if ((int64)bytecount <= 0) { #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) TIFFErrorExt(tif->tif_clientdata, module, "%I64u: Invalid strip byte count, strip %lu", (unsigned __int64) bytecount, (unsigned long) strip); #else TIFFErrorExt(tif->tif_clientdata, module, "%llu: Invalid strip byte count, strip %lu", (unsigned long long) bytecount, (unsigned long) strip); #endif return ((tmsize_t)(-1)); } bytecountm = (tmsize_t)bytecount; if ((uint64)bytecountm!=bytecount) { TIFFErrorExt(tif->tif_clientdata, module, "Integer overflow"); return ((tmsize_t)(-1)); } if (size != (tmsize_t)(-1) && size < bytecountm) bytecountm = size; return (TIFFReadRawStrip1(tif, strip, buf, bytecountm, module)); }
/* * Read a strip of data from the file. */ tsize_t TIFFReadRawStrip(TIFF* tif, tstrip_t strip, tdata_t buf, tsize_t size) { static const char module[] = "TIFFReadRawStrip"; TIFFDirectory *td = &tif->tif_dir; /* * FIXME: butecount should have tsize_t type, but for now libtiff * defines tsize_t as a signed 32-bit integer and we are losing * ability to read arrays larger than 2^31 bytes. So we are using * uint32 instead of tsize_t here. */ uint32 bytecount; if (!TIFFCheckRead(tif, 0)) return ((tsize_t) -1); if (strip >= td->td_nstrips) { TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "%lu: Strip out of range, max %lu", (unsigned long) strip, (unsigned long) td->td_nstrips); return ((tsize_t) -1); } if (tif->tif_flags&TIFF_NOREADRAW) { TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "Compression scheme does not support access to raw uncompressed data"); return ((tsize_t) -1); } bytecount = td->td_stripbytecount[strip]; if (bytecount <= 0) { TIFFErrorExt(tif->tif_clientdata, tif->tif_name, "%lu: Invalid strip byte count, strip %lu", (unsigned long) bytecount, (unsigned long) strip); return ((tsize_t) -1); } if (size != (tsize_t)-1 && (uint32)size < bytecount) bytecount = size; return (TIFFReadRawStrip1(tif, strip, buf, bytecount, module)); }
/* * Read a strip of data and decompress the specified * amount into the user-supplied buffer. */ tmsize_t TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size) { static const char module[] = "TIFFReadEncodedStrip"; TIFFDirectory *td = &tif->tif_dir; tmsize_t stripsize; uint16 plane; stripsize=TIFFReadEncodedStripGetStripSize(tif, strip, &plane); if (stripsize==((tmsize_t)(-1))) return((tmsize_t)(-1)); /* shortcut to avoid an extra memcpy() */ if( td->td_compression == COMPRESSION_NONE && size!=(tmsize_t)(-1) && size >= stripsize && !isMapped(tif) && ((tif->tif_flags&TIFF_NOREADRAW)==0) ) { if (TIFFReadRawStrip1(tif, strip, buf, stripsize, module) != stripsize) return ((tmsize_t)(-1)); if (!isFillOrder(tif, td->td_fillorder) && (tif->tif_flags & TIFF_NOBITREV) == 0) TIFFReverseBits(buf,stripsize); (*tif->tif_postdecode)(tif,buf,stripsize); return (stripsize); } if ((size!=(tmsize_t)(-1))&&(size<stripsize)) stripsize=size; if (!TIFFFillStrip(tif,strip)) return((tmsize_t)(-1)); if ((*tif->tif_decodestrip)(tif,buf,stripsize,plane)<=0) return((tmsize_t)(-1)); (*tif->tif_postdecode)(tif,buf,stripsize); return(stripsize); }
/* * Read the specified strip and setup for decoding. * The data buffer is expanded, as necessary, to * hold the strip's data. */ static int TIFFFillStrip(TIFF* tif, tstrip_t strip) { static const char module[] = "TIFFFillStrip"; TIFFDirectory *td = &tif->tif_dir; tsize_t bytecount; bytecount = td->td_stripbytecount[strip]; if (isMapped(tif) && (td->td_fillorder == tif->tif_fillorder || (tif->tif_flags & TIFF_NOBITREV))) { /* * The image is mapped into memory and we either don't * need to flip bits or the compression routine is going * to handle this operation itself. In this case, avoid * copying the raw data and instead just reference the * data from the memory mapped file image. This assumes * that the decompression routines do not modify the * contents of the raw data buffer (if they try to, * the application will get a fault since the file is * mapped read-only). */ if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) _TIFFfree(tif->tif_rawdata); tif->tif_flags &= ~TIFF_MYBUFFER; if (td->td_stripoffset[strip] + bytecount > tif->tif_size) { /* * This error message might seem strange, but it's * what would happen if a read were done instead. */ TIFFError(module, "%s: Read error on strip %lu", tif->tif_name, (u_long) strip); tif->tif_curstrip = -1; /* unknown state */ return (0); } tif->tif_rawdatasize = bytecount; tif->tif_rawdata = tif->tif_base + td->td_stripoffset[strip]; } else { /* * Expand raw data buffer, if needed, to * hold data strip coming from file * (perhaps should set upper bound on * the size of a buffer we'll use?). */ if (bytecount > tif->tif_rawdatasize) { tif->tif_curstrip = -1; /* unknown state */ if ((tif->tif_flags & TIFF_MYBUFFER) == 0) { TIFFError(module, "%s: Data buffer too small to hold strip %lu", tif->tif_name, (u_long) strip); return (0); } if (!TIFFReadBufferSetup(tif, 0, roundup(bytecount, 1024))) return (0); } if (TIFFReadRawStrip1(tif, strip, (u_char *)tif->tif_rawdata, bytecount, module) != bytecount) return (0); if (td->td_fillorder != tif->tif_fillorder && (tif->tif_flags & TIFF_NOBITREV) == 0) TIFFReverseBits(tif->tif_rawdata, bytecount); } return (TIFFStartStrip(tif, strip)); }
/* * Read the specified strip and setup for decoding. The data buffer is * expanded, as necessary, to hold the strip's data. */ int TIFFFillStrip(TIFF* tif, uint32 strip) { static const char module[] = "TIFFFillStrip"; TIFFDirectory *td = &tif->tif_dir; if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount) return 0; if ((tif->tif_flags&TIFF_NOREADRAW)==0) { uint64 bytecount = td->td_stripbytecount[strip]; if ((int64)bytecount <= 0) { #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) TIFFErrorExt(tif->tif_clientdata, module, "Invalid strip byte count %I64u, strip %lu", (unsigned __int64) bytecount, (unsigned long) strip); #else TIFFErrorExt(tif->tif_clientdata, module, "Invalid strip byte count %llu, strip %lu", (unsigned long long) bytecount, (unsigned long) strip); #endif return (0); } /* To avoid excessive memory allocations: */ /* Byte count should normally not be larger than a number of */ /* times the uncompressed size plus some margin */ if( bytecount > 1024 * 1024 ) { /* 10 and 4096 are just values that could be adjusted. */ /* Hopefully they are safe enough for all codecs */ tmsize_t stripsize = TIFFStripSize(tif); if( stripsize != 0 && (bytecount - 4096) / 10 > (uint64)stripsize ) { uint64 newbytecount = (uint64)stripsize * 10 + 4096; if( (int64)newbytecount >= 0 ) { #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) TIFFWarningExt(tif->tif_clientdata, module, "Too large strip byte count %I64u, strip %lu. Limiting to %I64u", (unsigned __int64) bytecount, (unsigned long) strip, (unsigned __int64) newbytecount); #else TIFFErrorExt(tif->tif_clientdata, module, "Too large strip byte count %llu, strip %lu. Limiting to %llu", (unsigned long long) bytecount, (unsigned long) strip, (unsigned long long) newbytecount); #endif bytecount = newbytecount; } } } if (isMapped(tif)) { /* * We must check for overflow, potentially causing * an OOB read. Instead of simple * * td->td_stripoffset[strip]+bytecount > tif->tif_size * * comparison (which can overflow) we do the following * two comparisons: */ if (bytecount > (uint64)tif->tif_size || td->td_stripoffset[strip] > (uint64)tif->tif_size - bytecount) { /* * This error message might seem strange, but * it's what would happen if a read were done * instead. */ #if defined(__WIN32__) && (defined(_MSC_VER) || defined(__MINGW32__)) TIFFErrorExt(tif->tif_clientdata, module, "Read error on strip %lu; " "got %I64u bytes, expected %I64u", (unsigned long) strip, (unsigned __int64) tif->tif_size - td->td_stripoffset[strip], (unsigned __int64) bytecount); #else TIFFErrorExt(tif->tif_clientdata, module, "Read error on strip %lu; " "got %llu bytes, expected %llu", (unsigned long) strip, (unsigned long long) tif->tif_size - td->td_stripoffset[strip], (unsigned long long) bytecount); #endif tif->tif_curstrip = NOSTRIP; return (0); } } if (isMapped(tif) && (isFillOrder(tif, td->td_fillorder) || (tif->tif_flags & TIFF_NOBITREV))) { /* * The image is mapped into memory and we either don't * need to flip bits or the compression routine is * going to handle this operation itself. In this * case, avoid copying the raw data and instead just * reference the data from the memory mapped file * image. This assumes that the decompression * routines do not modify the contents of the raw data * buffer (if they try to, the application will get a * fault since the file is mapped read-only). */ if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) { _TIFFfree(tif->tif_rawdata); tif->tif_rawdata = NULL; tif->tif_rawdatasize = 0; } tif->tif_flags &= ~TIFF_MYBUFFER; tif->tif_rawdatasize = (tmsize_t)bytecount; tif->tif_rawdata = tif->tif_base + (tmsize_t)td->td_stripoffset[strip]; tif->tif_rawdataoff = 0; tif->tif_rawdataloaded = (tmsize_t) bytecount; /* * When we have tif_rawdata reference directly into the memory mapped file * we need to be pretty careful about how we use the rawdata. It is not * a general purpose working buffer as it normally otherwise is. So we * keep track of this fact to avoid using it improperly. */ tif->tif_flags |= TIFF_BUFFERMMAP; } else { /* * Expand raw data buffer, if needed, to hold data * strip coming from file (perhaps should set upper * bound on the size of a buffer we'll use?). */ tmsize_t bytecountm; bytecountm=(tmsize_t)bytecount; if ((uint64)bytecountm!=bytecount) { TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow"); return(0); } if (bytecountm > tif->tif_rawdatasize) { tif->tif_curstrip = NOSTRIP; if ((tif->tif_flags & TIFF_MYBUFFER) == 0) { TIFFErrorExt(tif->tif_clientdata, module, "Data buffer too small to hold strip %lu", (unsigned long) strip); return (0); } } if (tif->tif_flags&TIFF_BUFFERMMAP) { tif->tif_curstrip = NOSTRIP; tif->tif_rawdata = NULL; tif->tif_rawdatasize = 0; tif->tif_flags &= ~TIFF_BUFFERMMAP; } if( isMapped(tif) ) { if (bytecountm > tif->tif_rawdatasize && !TIFFReadBufferSetup(tif, 0, bytecountm)) { return (0); } if (TIFFReadRawStrip1(tif, strip, tif->tif_rawdata, bytecountm, module) != bytecountm) { return (0); } } else { if (TIFFReadRawStripOrTile2(tif, strip, 1, bytecountm, module) != bytecountm) { return (0); } } tif->tif_rawdataoff = 0; tif->tif_rawdataloaded = bytecountm; if (!isFillOrder(tif, td->td_fillorder) && (tif->tif_flags & TIFF_NOBITREV) == 0) TIFFReverseBits(tif->tif_rawdata, bytecountm); } } return (TIFFStartStrip(tif, strip)); }
/* * Read the specified strip and setup for decoding. The data buffer is * expanded, as necessary, to hold the strip's data. */ int TIFFFillStrip(TIFF* tif, tstrip_t strip) { static const char module[] = "TIFFFillStrip"; TIFFDirectory *td = &tif->tif_dir; if ((tif->tif_flags&TIFF_NOREADRAW)==0) { /* * FIXME: butecount should have tsize_t type, but for now * libtiff defines tsize_t as a signed 32-bit integer and we * are losing ability to read arrays larger than 2^31 bytes. * So we are using uint32 instead of tsize_t here. */ uint32 bytecount = td->td_stripbytecount[strip]; if (bytecount <= 0) { TIFFErrorExt(tif->tif_clientdata, module, "%s: Invalid strip byte count %lu, strip %lu", tif->tif_name, (unsigned long) bytecount, (unsigned long) strip); return (0); } if (isMapped(tif) && (isFillOrder(tif, td->td_fillorder) || (tif->tif_flags & TIFF_NOBITREV))) { /* * The image is mapped into memory and we either don't * need to flip bits or the compression routine is * going to handle this operation itself. In this * case, avoid copying the raw data and instead just * reference the data from the memory mapped file * image. This assumes that the decompression * routines do not modify the contents of the raw data * buffer (if they try to, the application will get a * fault since the file is mapped read-only). */ if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) _TIFFfree(tif->tif_rawdata); tif->tif_flags &= ~TIFF_MYBUFFER; /* * We must check for overflow, potentially causing * an OOB read. Instead of simple * * td->td_stripoffset[strip]+bytecount > tif->tif_size * * comparison (which can overflow) we do the following * two comparisons: */ if (bytecount > tif->tif_size || td->td_stripoffset[strip] > tif->tif_size - bytecount) { /* * This error message might seem strange, but * it's what would happen if a read were done * instead. */ TIFFErrorExt(tif->tif_clientdata, module, "%s: Read error on strip %lu; " "got %lu bytes, expected %lu", tif->tif_name, (unsigned long) strip, (unsigned long) tif->tif_size - td->td_stripoffset[strip], (unsigned long) bytecount); tif->tif_curstrip = NOSTRIP; return (0); } tif->tif_rawdatasize = bytecount; tif->tif_rawdata = tif->tif_base + td->td_stripoffset[strip]; } else { /* * Expand raw data buffer, if needed, to hold data * strip coming from file (perhaps should set upper * bound on the size of a buffer we'll use?). */ if (bytecount > (uint32)tif->tif_rawdatasize) { tif->tif_curstrip = NOSTRIP; if ((tif->tif_flags & TIFF_MYBUFFER) == 0) { TIFFErrorExt(tif->tif_clientdata, module, "%s: Data buffer too small to hold strip %lu", tif->tif_name, (unsigned long) strip); return (0); } if (!TIFFReadBufferSetup(tif, 0, TIFFroundup(bytecount, 1024))) return (0); } if ((uint32)TIFFReadRawStrip1(tif, strip, (unsigned char *)tif->tif_rawdata, bytecount, module) != bytecount) return (0); if (!isFillOrder(tif, td->td_fillorder) && (tif->tif_flags & TIFF_NOBITREV) == 0) TIFFReverseBits(tif->tif_rawdata, bytecount); } } return (TIFFStartStrip(tif, strip)); }
/* * Read the specified strip and setup for decoding. The data buffer is * expanded, as necessary, to hold the strip's data. */ int TIFFFillStrip(TIFF* tif, uint32 strip) { static const char module[] = "TIFFFillStrip"; TIFFDirectory *td = &tif->tif_dir; if (!_TIFFFillStriles( tif ) || !tif->tif_dir.td_stripbytecount) return 0; if ((tif->tif_flags&TIFF_NOREADRAW)==0) { uint64 bytecount = td->td_stripbytecount[strip]; if ((int64)bytecount <= 0) { TIFFErrorExt(tif->tif_clientdata, module, "Invalid strip byte count " TIFF_UINT64_FORMAT ", strip %lu", (TIFF_UINT64_T) bytecount, (unsigned long) strip); return (0); } if (isMapped(tif) && (isFillOrder(tif, td->td_fillorder) || (tif->tif_flags & TIFF_NOBITREV))) { /* * The image is mapped into memory and we either don't * need to flip bits or the compression routine is * going to handle this operation itself. In this * case, avoid copying the raw data and instead just * reference the data from the memory mapped file * image. This assumes that the decompression * routines do not modify the contents of the raw data * buffer (if they try to, the application will get a * fault since the file is mapped read-only). */ if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) { _TIFFfree(tif->tif_rawdata); tif->tif_rawdata = NULL; tif->tif_rawdatasize = 0; } tif->tif_flags &= ~TIFF_MYBUFFER; /* * We must check for overflow, potentially causing * an OOB read. Instead of simple * * td->td_stripoffset[strip]+bytecount > tif->tif_size * * comparison (which can overflow) we do the following * two comparisons: */ if (bytecount > (uint64)tif->tif_size || td->td_stripoffset[strip] > (uint64)tif->tif_size - bytecount) { /* * This error message might seem strange, but * it's what would happen if a read were done * instead. */ TIFFErrorExt(tif->tif_clientdata, module, "Read error on strip %lu; " "got " TIFF_UINT64_FORMAT " bytes, expected " TIFF_UINT64_FORMAT, (unsigned long) strip, (TIFF_UINT64_T) tif->tif_size - td->td_stripoffset[strip], (TIFF_UINT64_T) bytecount); tif->tif_curstrip = NOSTRIP; return (0); } tif->tif_rawdatasize = (tmsize_t)bytecount; tif->tif_rawdata = tif->tif_base + (tmsize_t)td->td_stripoffset[strip]; tif->tif_rawdataoff = 0; tif->tif_rawdataloaded = (tmsize_t) bytecount; /* * When we have tif_rawdata reference directly into the memory mapped file * we need to be pretty careful about how we use the rawdata. It is not * a general purpose working buffer as it normally otherwise is. So we * keep track of this fact to avoid using it improperly. */ tif->tif_flags |= TIFF_BUFFERMMAP; } else { /* * Expand raw data buffer, if needed, to hold data * strip coming from file (perhaps should set upper * bound on the size of a buffer we'll use?). */ tmsize_t bytecountm; bytecountm=(tmsize_t)bytecount; if ((uint64)bytecountm!=bytecount) { TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow"); return(0); } if (bytecountm > tif->tif_rawdatasize) { tif->tif_curstrip = NOSTRIP; if ((tif->tif_flags & TIFF_MYBUFFER) == 0) { TIFFErrorExt(tif->tif_clientdata, module, "Data buffer too small to hold strip %lu", (unsigned long) strip); return (0); } if (!TIFFReadBufferSetup(tif, 0, bytecountm)) return (0); } if (tif->tif_flags&TIFF_BUFFERMMAP) { tif->tif_curstrip = NOSTRIP; if (!TIFFReadBufferSetup(tif, 0, bytecountm)) return (0); } if (TIFFReadRawStrip1(tif, strip, tif->tif_rawdata, bytecountm, module) != bytecountm) return (0); tif->tif_rawdataoff = 0; tif->tif_rawdataloaded = bytecountm; if (!isFillOrder(tif, td->td_fillorder) && (tif->tif_flags & TIFF_NOBITREV) == 0) TIFFReverseBits(tif->tif_rawdata, bytecountm); } } return (TIFFStartStrip(tif, strip)); }
/* * Read the specified strip and setup for decoding. The data buffer is * expanded, as necessary, to hold the strip's data. */ int TIFFFillStrip(TIFF* tif, uint32 strip) { static const char module[] = "TIFFFillStrip"; TIFFDirectory *td = &tif->tif_dir; _TIFFFillStriles( tif ); if ((tif->tif_flags&TIFF_NOREADRAW)==0) { uint64 bytecount = td->td_stripbytecount[strip]; if (bytecount <= 0) { #if defined(__WIN32__) && defined(_MSC_VER) TIFFErrorExt(tif->tif_clientdata, module, "Invalid strip byte count %I64u, strip %lu", (unsigned __int64) bytecount, (unsigned long) strip); #else TIFFErrorExt(tif->tif_clientdata, module, "Invalid strip byte count %llu, strip %lu", (unsigned long long) bytecount, (unsigned long) strip); #endif return (0); } if (isMapped(tif) && (isFillOrder(tif, td->td_fillorder) || (tif->tif_flags & TIFF_NOBITREV))) { /* * The image is mapped into memory and we either don't * need to flip bits or the compression routine is * going to handle this operation itself. In this * case, avoid copying the raw data and instead just * reference the data from the memory mapped file * image. This assumes that the decompression * routines do not modify the contents of the raw data * buffer (if they try to, the application will get a * fault since the file is mapped read-only). */ if ((tif->tif_flags & TIFF_MYBUFFER) && tif->tif_rawdata) _TIFFfree(tif->tif_rawdata); tif->tif_flags &= ~TIFF_MYBUFFER; /* * We must check for overflow, potentially causing * an OOB read. Instead of simple * * td->td_stripoffset[strip]+bytecount > tif->tif_size * * comparison (which can overflow) we do the following * two comparisons: */ if (bytecount > (uint64)tif->tif_size || td->td_stripoffset[strip] > (uint64)tif->tif_size - bytecount) { /* * This error message might seem strange, but * it's what would happen if a read were done * instead. */ #if defined(__WIN32__) && defined(_MSC_VER) TIFFErrorExt(tif->tif_clientdata, module, "Read error on strip %lu; " "got %I64u bytes, expected %I64u", (unsigned long) strip, (unsigned __int64) tif->tif_size - td->td_stripoffset[strip], (unsigned __int64) bytecount); #else TIFFErrorExt(tif->tif_clientdata, module, "Read error on strip %lu; " "got %llu bytes, expected %llu", (unsigned long) strip, (unsigned long long) tif->tif_size - td->td_stripoffset[strip], (unsigned long long) bytecount); #endif tif->tif_curstrip = NOSTRIP; return (0); } tif->tif_rawdatasize = (tmsize_t)bytecount; tif->tif_rawdata = tif->tif_base + (tmsize_t)td->td_stripoffset[strip]; tif->tif_rawdataoff = 0; tif->tif_rawdataloaded = (tmsize_t) bytecount; } else { /* * Expand raw data buffer, if needed, to hold data * strip coming from file (perhaps should set upper * bound on the size of a buffer we'll use?). */ tmsize_t bytecountm; bytecountm=(tmsize_t)bytecount; if ((uint64)bytecountm!=bytecount) { TIFFErrorExt(tif->tif_clientdata,module,"Integer overflow"); return(0); } if (bytecountm > tif->tif_rawdatasize) { tif->tif_curstrip = NOSTRIP; if ((tif->tif_flags & TIFF_MYBUFFER) == 0) { TIFFErrorExt(tif->tif_clientdata, module, "Data buffer too small to hold strip %lu", (unsigned long) strip); return (0); } if (!TIFFReadBufferSetup(tif, 0, bytecountm)) return (0); } if (TIFFReadRawStrip1(tif, strip, tif->tif_rawdata, bytecountm, module) != bytecountm) return (0); tif->tif_rawdataoff = 0; tif->tif_rawdataloaded = bytecountm; if (!isFillOrder(tif, td->td_fillorder) && (tif->tif_flags & TIFF_NOBITREV) == 0) TIFFReverseBits(tif->tif_rawdata, bytecountm); } } return (TIFFStartStrip(tif, strip)); }
/* * Read a strip of data and decompress the specified * amount into the user-supplied buffer. */ tmsize_t TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size) { static const char module[] = "TIFFReadEncodedStrip"; TIFFDirectory *td = &tif->tif_dir; uint32 rowsperstrip; uint32 stripsperplane; uint32 stripinplane; uint16 plane; uint32 rows; tmsize_t stripsize; if (!TIFFCheckRead(tif,0)) return((tmsize_t)(-1)); if (strip>=td->td_nstrips) { TIFFErrorExt(tif->tif_clientdata,module, "%lu: Strip out of range, max %lu",(unsigned long)strip, (unsigned long)td->td_nstrips); return((tmsize_t)(-1)); } /* * Calculate the strip size according to the number of * rows in the strip (check for truncated last strip on any * of the separations). */ rowsperstrip=td->td_rowsperstrip; if (rowsperstrip>td->td_imagelength) rowsperstrip=td->td_imagelength; stripsperplane= TIFFhowmany_32_maxuint_compat(td->td_imagelength, rowsperstrip); stripinplane=(strip%stripsperplane); plane=(uint16)(strip/stripsperplane); rows=td->td_imagelength-stripinplane*rowsperstrip; if (rows>rowsperstrip) rows=rowsperstrip; stripsize=TIFFVStripSize(tif,rows); if (stripsize==0) return((tmsize_t)(-1)); /* shortcut to avoid an extra memcpy() */ if( td->td_compression == COMPRESSION_NONE && size!=(tmsize_t)(-1) && size >= stripsize && !isMapped(tif) && ((tif->tif_flags&TIFF_NOREADRAW)==0) ) { if (TIFFReadRawStrip1(tif, strip, buf, stripsize, module) != stripsize) return ((tmsize_t)(-1)); if (!isFillOrder(tif, td->td_fillorder) && (tif->tif_flags & TIFF_NOBITREV) == 0) TIFFReverseBits(buf,stripsize); (*tif->tif_postdecode)(tif,buf,stripsize); return (stripsize); } if ((size!=(tmsize_t)(-1))&&(size<stripsize)) stripsize=size; if (!TIFFFillStrip(tif,strip)) return((tmsize_t)(-1)); if ((*tif->tif_decodestrip)(tif,buf,stripsize,plane)<=0) return((tmsize_t)(-1)); (*tif->tif_postdecode)(tif,buf,stripsize); return(stripsize); }